C.H.I. Micro-Grooved Polystyrene 3285

C.H.I. Micro-Grooved Polystyrene 3285

Designed to enhance appearances in a variety of applications, this insulated commercial garage door will augment the look of both homes and businesses alike. The door is distinguished by four evenly spaced micro-grooves that run horizontally across each section. This design incorporates the tongue-and-groove joint between each section and gives the door an even, symmetrical appearance. Businesses and homeowners alike will soon take for granted the added durability and insulating value that this double-sided, polystyrene, core-insulated steel door offers.

Garage Door Features

  • 2” Thick Sections
  • 26 gauge front and 27-gauge back commercial quality steel
  • Polystyrene insulation
  • Four evenly spaced micro-grooves run horizontally across each section
  • Max Width - 28'2" (contact customer service for larger sizes)
  • Colors – White, Almond, Sandstone or Brown, stock RAL powder-coat option in 188 colors
  • R-value** 10.29
  • Various accessories and options available.
  • Accents Logos is available as an option for interior and exterior applications
  • Accents Woodtones is available as an option in cedar, mahogany, light oak and dark oak

**R-Values have been calculated in accordance with ASTM C518 standards

Garage Door Sections

  • Features four evenly spaced micro-grooves that run horizontally across each section
  • Double-sided steel doors are 26-gauge front and 27-gauge back for sturdiness
  • Concealed steel back-up plates run from top to bottom of each section for secure hardware attachment
  • Section joints are tongue-and-groove
  • White painted end stiles
  • Bottom “U” type astragal is a standard feature


  • Polystyrene core secured in place with a urethane adhesive to increase structural integrity
  • Insulated doors R-value: 10.29 (R-value Testing is in accordance with ASTM C518 standards)


  • Available in white, almond, sandstone, or brown
  • Optional Colors include RAL powder-coat in 188 colors

Garage Door Tracks

  • Tracks are 2” or 3”, as specified
  • Available in bracket mount, angle mount, clip angle mount, 12” radius, 15” radius, high lift, vertical lift, roof pitch, or dual track low headroom
  • Optional one (1) piece 2” vertical lift track is available for doors 7’ to 10’ high

Track gauge:

  • 2” Tracks – up to 8’-0” high = 17 gauge roll-formed galvanized steel
  • 2” Tracks - 8’-0” 10’-0” = 16 gauge
  • 2” Tracks - over 10’-0” = 14 gauge
  • 3” Tracks – 12 gauge

Garage Door Hardware

  • Package includes 11-gauge or 14-gauge hinges, as specified
  • 2” or 3” long-stem or short-stem steel ball bearings rollers
  • Single or double end stiles
  • Heavy-duty adjustable top roller brackets

Garage Door Springs

  • Torsion springs are helically wound with oil-tempered wire
  • Springs are individually-calibrated for each door
  • Torsion tubes are galvanized for rust resistance
  • High-cycle spring options may be specified

Garage Door Lites

Optional Window Designs:

  • 24” x 6”, 24” x 12” or 34" x 16" lites with 1” insulated glass (plain, tinted or frosted)
  • Aluminum Frame to match size and panel layout of steel section – Optional field glazing, 1/8” DSB, 1/8" polycarbonate, 1/8" tempered glass, 1/4” tempered glass, 1/2” insulated glass or 1/2" tempered insulated

Garage Door Optional Accessories

Doors are available with a variety of Specialty Options for specific installation needs. Contact Factory for additional options.

Swing-Up Sectional Post

A perfect answer for openings that are too large for a single overhead door that must accommodate large machinery or equipment on an infrequent basis. Operating on a single pivot point that is designed to swing left or right, it allows the use of one (1) smaller door for everyday requirements and the full opening when needed. See video.

Header & Jamb Seals

Seal the perimeter of the opening to provide additional air infiltration and thermal protection.

Garage Door Windload

Wind can be unpredictable and destructive. This is why C.H.I. Windbreaker Series and iSeries doors are designed, tested, and built to the most rugged specifications. Wind chamber tested to ensure windload resistance, these extra-sturdy designs provide enhanced defense against the elements.

C.H.I. Overhead Doors developed the resilient Windbreaker Series garage doors to protect against high wind conditions. The super-resilient C.H.I. iSeries Impact Approved doors have strength designed to withstand direct collision of projectiles and other windborne debris at high speeds.



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